Use coconutBattery for battery information
coconutBattery’s official site describes battery and device information, including current battery details and historical capacity information. That can be useful when the concern is battery wear, charging behavior, or a changing capacity reading over time.
Battery health is not the same as an overnight sleep-drain diagnosis. A worn battery can affect runtime, while a healthy battery can still lose charge when the Mac wakes or stays active. Start by naming which question you need answered.
Use WattGuard for a sleep or activity pattern
WattGuard reads local macOS power history and presents sleep, normal wake, dark wake, charge change, wake reasons, and completed blockers. It also groups process families using CPU, wakeups, and disk activity. This can help turn an unexpected sleep session into a focused test.
Its readings are diagnostic context. Some macOS counters support measured power, but not every app has an exact watts or battery-percentage result. A wake reason points to an investigation, not a definitive allocation of loss.
A practical division of work
Check battery condition and capacity information when the concern is long-term runtime. Use WattGuard to compare comparable sleep sessions before and after one change when the concern is timing, wakes, or active software. The tools can be complementary, and neither replaces Apple Diagnostics or service for a suspected hardware issue.